import turtle

def koch(size,n):
    if n == 0:
        turtle.fd(size)
    else:
        for angle in (0,60,-120,60):
            turtle.left(angle)
            koch(size/3,n-1)

turtle.setup(600,600)
turtle.penup()
turtle.goto(-200,100)
turtle.pendown()
turtle.pensize(2)
level=3
for i in range(3):
    koch(400,level)
    turtle.right(120)
turtle.hideturtle()
